Study on Physicochemical Properties and Potential Applications of Chemically Treated Luffa Sponge Fibers

JOURNAL OF NATURAL FIBERS(2022)

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摘要
To explore and expand the application of luffa sponge (LS) fiber, three methods were used to chemically modify the LS fibers. The nanoindentation (NI) results show that the LS fibers exhibit a high elastic modulus (12.4 GPa) and hardness (0.7 GPa). Upon treating the fibers with 5%NaOH-5%H2O2, the NI hardness of the fibers increases by 14.3%. However, when 10%NaOH-20%CH3COOH (method B) is used, the hardness of the cell walls decreases by 28.6%. In this case, the removal of amorphous substances from the LS fibers and the swelling reaction of the LS cellulose plays a significant role. Three chemical treatments can partially remove the hemicellulose in the LS fiber. 18%NaOH-1.6%CO(NH2)(2) (method C) modifies the crystalline structure of the cellulose in the LS fibers. Gas chromatography-mass spectrometry results show that the LS fibers are rich in hexadecanoic acid (14.3%), as well as in substances, such as squalene, oleic acid, and behenic alcohol, which exhibit a high antibiofilm activity. Furthermore, method B increases the total relative content of squalene and squalane in the LS extract by 49.4%; while method C treatment allows LS fibers have the potential to be used to develop phase-change energy storage materials and anti-photoaging discoloration materials.
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关键词
Luffa sponge fiber, chemical treatment, C-13 nuclear magnetic resonance, gas chromatography-mass spectrometry, chemical composition, nanoindentation
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